An urgent service call in the middle of spring
One April morning in Côte-des-Neiges , a customer contacted us about a Gree wall-mounted heat pump that was refusing to produce heat. After a harsh winter, this breakdown, which occurred mid-season—when the nights are still cold—was causing real discomfort in the home.
At AirGreen , we know how essential these wall-mounted HVAC systems are to the comfort of Montreal households. So, we quickly dispatched a certified technician to the site to diagnose and correct the problem before the end of the day.
Heat pump inspection and diagnosis
Upon arrival, we found that the indoor unit was partially disassembled , exposing the aluminum and copper evaporator. This indicated that the customer had attempted an initial cleaning without success. The evaporator, covered in dust and deposits, also showed traces of moisture—often a symptom of poor condensate drainage .
We carried out a complete diagnosis:
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Defrost cycle inoperative.
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Electronic card no longer responding to certain signals from the temperature sensor.
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Drainage blocked by a buildup of dust and biofilm.
These three anomalies combined explained the heating failure and temperature fluctuations reported by the customer.
AirGreen intervention: rigor and precision
The intervention took place in several carefully planned stages:
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Thorough cleaning of the evaporator and fan using a specialized, non-corrosive cleaner. This process restored airflow and removed deposits that were impairing heat exchange efficiency.
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Replacement of the defective temperature sensor , an essential part for the correct activation of the heating mode.
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Revision of the drainage circuit , dismantling of the condensate tray and complete cleaning of the drain pipe, in order to prevent any water leaks on the wall.
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Checked the wiring and the electronic board — a slight loose contact on the sensor terminal had caused an erroneous temperature reading.
After these repairs, the heat pump restarted without any anomalies, displaying stable operation and optimal performance.
Result: restored comfort and improved performance
A few minutes after restarting, the blown air reached 38°C in heating mode . The customer immediately noticed a clear difference: no more abnormal noises or sudden interruptions. The system was again operating within the parameters recommended by Gree .
We took advantage of the visit to remind him of some essential advice:
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Clean the internal filters every 4 to 6 weeks.
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Avoid handling internal sensors without professional assistance.
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Schedule an annual AirGreen maintenance before winter to prevent clogging and condensate leaks.
AirGreen expertise in Montreal and beyond
At AirGreen , we work on all types of wall-mounted heat pumps — whether Gree, Fujitsu, Sharp, Midea or Lennox — and throughout the Greater Montreal area: Montreal, Laval, Longueuil, the North Shore and the South Shore .
Our customers always benefit from:
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Accurate diagnostics thanks to our calibrated digital instruments.
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Durable repairs with manufacturer-approved genuine parts.
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Fast and discreet interventions , adapted to the realities of urban housing.
Whether it's an R-32 refrigerant problem, a faulty electronic board , or a blocked drainage system , our technicians have the expertise and equipment to quickly restore your unit's performance.
A service focused on reliability and satisfaction
This Gree wall-mounted heat pump repair in Côte-des-Neiges illustrates our approach: meticulous, efficient, and transparent interventions. Every step—from diagnosis to final inspection—is carried out according to the strictest standards in the heating, ventilation, and air conditioning (HVAC) industry.
Our mission is simple: to provide each customer with lasting comfort while maximizing the energy efficiency of their system.